Heating-furnace.



J. J. HARKINS.

HEATING FURNACE.

APPLICATION FILED MAR. s, 1907.

Patented Dec. 8, 1908.

2 SHEETS-SHEET 1.

J. J. HARKINS.

HEATING FURNACE.

APPLICATION FILED MAR. a, 1907..

Patented Dec. 8, 1908.

2 SHEBTS--SHEBT 2.

Ham,

No. scenic.

Specification of Letztere Patent.

Patented Dc. 8`, 190'8.

` Application med umn s, 19o?. semi No. 361,401.

To all whom 'it may concern:

Be it known that I, JAMES J. HARKrNs, a resident of Pittsburg, in thecounty ofAllegheny and State of Pennsylvania, have invented a new Vanduseful Improvement in Heating-Furnaces; and I do declare the followin tobe a full, clear, and exact description t ereof.

My invention relates to heating furnaces and has special reference towhat are known as continuous heating furnaces for the heating ofbillets, blooms, slabs, etc.

The object of my invention is to provide a heating furnace which will becheap, simple and efficient in its construction and operation, in whichthe metal can be heated in less time and with less labor than in theordinary .class of these furnaces, as well as one whi will therebycheapen the cost of production and will facilitate repairs.

My invention consists, generally stated, in the novel arrangement,construction and combination of parts, as hereinafter more specificallyset forth and described and particularly ointed out in the claims.

To ena le others skilled in the art to which my invention appertains toconstruct and use my invention, I will describe the same more fullyreferring to the accompanying drawings, in Which- Figure 1 is a verticalcentral section of my v improved apparatus for heating furnaces andshowing a section of the furnace through the as ilues. Fig. 2 is ahorizontal section of the mace on the line 2 2 Fi 1 looking in thedirection of the arrows an showing some of the parts broken away. Fig. 3is a vertical central section of the furnace, taken at right angle toFig. 1 on the line 3-3 Fig. 2 and showin some of the parts broken awayand in full es. Figs. 4Y and 5 are detail views.

Like symbols of reference herein indicate like parts in each of thefigures Vof the drawing.

As shown in the drawings the general form or superstructure of thefurnace 1 is the same as the usual form of a regenerative orrecuperative furnace-as shown, and Within the eating chamber 2 andrunning arallel with the sides of the furnace are the ivision walls 3,which are provided with the transverse archways 4 p to allow the char eof metal within the furnace 1 to pass un er the same in its movementwithin said furnace as hereinafter described. The furnace 1 being of theusual form is provided with the gas iiues a which lead from the gas.generating chambers b and into the chamber 2 with the air flues c whichlead from the usual source of supply into said chamber alongside of saidflues a. r

Within the center of the furnace 1 is the table, hearth or bottom 5 forthe'charge of metal and this bottom is circular and revoluble and iscomposed of the fire-brick hearth portion 6 which is provided with thebuilt-up annular ortions .7 extending up from the same wit the outer onebein ownwardly inclined towards the center o the furnace. Between theseportions 7 is placed a sandbed 7 having its upper face formed concavebetween the portions 7 and its inner side to form a recessed orcorrugated face and such bottom 5 is su ported on a plate 5 which isconnected to t e angle-bars 6 atits sides and within the inner and outerportions 7. The bottom 5 is provided with the central opening 10 throughthe same and within said opening the central furnace portion 10 is builtand supported on a central column 11. The column 11 is preferably formedof hollow cast iron and extending loosely around the same is a movablesleeve 11. Arms 12 extend radially out from a loose sleeve 13 on thecolumn 11 and are attached thereto, and these arms have the gear wheelor face 12 at outer ends of the same, while such arms are also connectedto the late 5 of the bottom 5 through the vertical disposed plates 5 Onthe underside o the arms 12 is a track 13 for engaging withanti-friction rollers 14 which are mounted upon one end of the pins 15,while the opposite ends of these pins are attened and secured betweenplates 16 in any suitable manner. On the upper and lower ends of theplates 16 are the flanged wheels 17 which are munted on pins 18passingthrough said plates and thereby form a columns 20 are preferably formedof two channel bars and the lates 16 of the movable carriage 19assetween them so that the rollers 17 will bear against each side ofsaid columns and thereby properly support the bottom 5 by said carriage.

The weight 24 will act to support the carriage 19 which in turn su portsthe bottom 5 through the rollers 14 an the columns 20 act as a guide andsupport for the movable carriage 19, as well as the sheave 23 and fourof these carriages are shown around the circumference of said bottom,but it is evident that any number can be used.

Engaging with the gear wheel 12 is the pinion 25 which is keyed by afeather around a vertical shaft 26 and this shaft has a worm wheel 27 atits lower end for being engaged by a worm 28 mounted on a horizontalshaft 29. Mounted on the shaft 29 is a gear-wheel 30 which meshes with apinion 31 mounted on a shaft 32 which carries a gear-wheel33 meshingwith a pinion 34 on the armature shaft 35 of a motor 36.

Fulcrumed at 37 on a bearing 38 supported by a standard 39 is avibrating lever 40 which is formed of two bars and spaced far enough toallow of the fulcrum 37 being laced between them and at one end of said)lever are secured the straps 41 which are connected at their free endswith pins 42 extending out from the annular seat. 43 formed in themovable sleeve 1 1 through slotted holes 44 in said ends of said straps.A vertical screw-rod 45 is psivotally connected at its lower end to lin46 which are pivotally connected to said lever 40 and the up er end ofsaid rod passes through a stan 47 and is screw threadedly connectedwithin a worm-wheel 48 secured on said stand by means of a bar 49through which said rod loosely passes. A worm 5() is mounted on a shaft51 secured on the stand 47 and such shaft is provided with two cranklevers 52 for raising and lowering the rod 45.

The use and operation of my improved aparatus for heating furnaces is asfollows:- en power is applied to the motor 36 the shaft 35 will berevolved which will act to revolve the shaft 29 through the gears 33 and34, shaft 32 and gears 30 and 31, and as such. shaft 29 is thus revolvedthe shaft 26 will be revolved throu h the worm 28 and its wheel 27,which will also revolve the bottom 5 through the pinion 25 on the shaft26 engaging with the gear-wheel l2 on said bottom. During this revolvinof thebottom 5 the billets, blooms or sla s; etc., such as A are chargedinto the chamber 2 of the furnace 1 through the opening B in saidfurnace in any suitable manner, so that they will lie on the outer andintermediate portions 7 on said bottom as shown in Figs. 2 and 3, toallow for the circulation of the heat under the same through the spacesformed by the upper concave face on the sand bed 7', and such chargingcan be accomplished automatically or otherwise by any suitablemechanism, as throu h the medium of an automatic sprocket mec anismshovm diagrammatically in Fig. 3 at C. 'lhis mechanism C is composed ofa sprocket chain 53 which passes through the opening B, and over thesprocket wheels 54, the inner of which is located within said openingand chamber 2 over the bottom 5, and such chain is provided with iingers55 for engaging with the metal A to be carried into said chamber fromthe table 56 to be heated. They chain 53 can be operated from the shaft29 by means of any suitable mechanism such as the pinion 57 on saidshaft meshing with a gear-wheel 58 on a shaft 59 which is provided witha 'sprocket wheel 60 having a s rocket chain 61 passing around the sameand) around a like wheel 62 on the shaft 63 carrying the outer sprocketWheel 54.

As the bottom 5 in the furnace 1 is revolved the metal A charged ontosaid bottom is heated within the chamber 2 and when such metal reachesthe opening D in the furnace 1 adjacent to the opening C therein it canbe discharged in any suitable manner and automaticallyif desired, as bymeans of a tilting bar 64 extending into said chamber through saidopening D and o erat'ed by any suitable mechanism connecte to themechanism for charging the metal into the furnace or other mechanism, asis desired.

The revolving bottom 5 ofthe furnace 1 is counterbalanced through theweight 24 when about one-halfof a charge of metal is within the chamber2of said furnace, so that when a full charge is within said furnace some`upward compression may be placed upon the rod 45, and when it isdesired to lower the bottom 5 the operators can turn the levers 52 inthe proper direction which will act to raise :the rod 45 Athrough themedium of the worm 50 and its wheel 48 and draw up the outer end of thetilting lever 4() and lower its inner end, so that this end will carrydown the sleevell on the column 11 and with it said bottom. As thebottom 5 is thus lowered the gear-Wheel 12. on the same will be loweredtherewith, as well as the pinion 25 on the shaft 26 and in the raisingof said 4bottom by a reverse movement of the cranks 52 the movablesleeve 11 and said bottom will be raised through the means abovedescribed, so that the inion 25 will be raised with the bottom anthrough its meshing with the wheel 12 permit said bottom to revolve whenpower is applied from the motor 36 for its operations. During theraising and lowering of the bottom 5 the carria e 19 will be moved onthe columns 2() throu the wei hts 24 in the same direction wit the saibottom and with the plates 16 moving within the said columns, so that insuch movement of the bottom the rollers 14 on said carriage will be inengagement with and support said bottom.

Various modifications andI changes in the design, construction andoperation of the various parts ,of my improved ap aratus for heatingfurnaces may e resorte to without lll@ departing from the spirit of theinvention or sacrificing any of its advantages.

It will thus be seen that my im roved apparatus for heatin furnaces cane a plied to any form of a eating furnace an with the use of char ingand discharging devices on the same these operations can be performedcontinuously and automatically and the whole charge may be drawn andrelaced in a very short space of time if it is found necessary to do so,while these operations can be carried on at one side of the furnace andadjacent to each other, thus savin heat and reducin oxidationby shuttingo large quantities o cold air:

The devices are easily and conveniently operated and will not be broughtinto contact with the heat of the furnace, while they can bewater-cooled if desired. They will not get out of order and will beldurab e and strong, and at the same time they 'will be positive andeasy to operate at all times and without the employment of complicatedmechanism. n

What I claim as my invention, and desire to secure by Letters Patent, is

1. A heating furnace having a heating chamber, a column, a revolvingbottom within said chamber, means including a weight.

for supporting the outer portion of said bottom in all its positions amovable sleeve on said column for carrying said bottom, and a screwoperated tilting lever or bar connected to said sleeve for'ralsing andlowering .said bottom.

2. A heating furnace having a heating chamber, a column, a revolvingbottom within said chamber, means including a weight for supporting theouter portion of said bottom in all its positions a movable sleeve onsaid column for carrying said bottom, a tilting lever or bar connectedto said sleeve, andv a screw-rod loosely connected to said bar forraising and lowering said bottom.

3. A heating furnace having a heating chamber, a column, a revolvingbottom within said chamber, means including a weight for supporting theouter portion of said bottom in all its positions a movable sleeve onsaid column for carryingrsaid bottom, a tilting lever or bar connectedto said sleeve,` a rod connected to said bar,l and means connected tosaid rod for tiltin said bar in the raisini and lowering of said ottom.

4. heating furnace having a heating chamber, a column, a revolvingbottom within said chamber, means including a weight for supporting theouter portion of said bottom in all its positions a movable sleeve onsaid column for carrying said bottom, a tilting lever bar connected tosaid sleeve, a rod connected to said bar, a worm-wheel screwthreadedlyconnected to said rod, and a worm engaging with said wheel for movingsaid rod to tilt said bar in the raising and lowering of said'bottom.

5. A heatingfurnace having a heating chamber, and a revolving circularbottom within said chamber having its upper face rovided with annularcorrugations extendmg u from and around the same for the free circuation of heat around the metal placed thereon to be heated. v

6. A heating furnace having a 4heatin chamber, a revolving bottom Withinsai chamber having its upper face rovided with corrugations extending upom the same for the circulation of heat around the chamber, upwardlyextending portions at its outer edge and intermediate thereof to'formcorrugatlons and said outer portion bein inclined downwardly toward thecenter o the furnace, and a sand-bed on said face and within therecesses formed between said portions and its inner side.

In testimony whereof I have signed my name to this specification inthepresence of l witnesses.

two subscribin p S J. HARKINS. [1.. s.] Witnesses:

C. J. HOFFMANN,

L. P. HOFFMANN.

